Introduction: It is important to distinguish chemical changes, in which new substances are formed, from physical changes, which do not create new substances. In this activity, you will look at many kinds of evidence that chemists use to see if a chemical change has taken place. To solve this you must use the explore learning website chemical changes gizmo. I WILL GIVE PIINTS AND BRAINLIEST! THANK YOU :)
Question: What kinds of evidence indicate a chemical change has taken place?
1. Observe: Some chemical reactions release heat, and others absorb heat. In an exothermic reaction, heat is released and the temperature of the system rises. In an endothermic reaction, heat is absorbed and the temperature of the system decreases.
In the Gizmo, drag the Thermometer into the flask of water.
What is the starting temperature?
Click Play, and wait for the reaction to end. What is the final temperature?
Was this reaction exothermic or endothermic?
Answers: 1
Chemistry, 22.06.2019 01:30
Pls! plant cells and animal cells were observed under a microscope. the characteristics of two cells are listed below. cell p: does not capture sunlight cell q: has cytoplasm but no chloroplast which statement about the two cells is correct? cell q also has a cell wall. cell q also has large vacuole. cell p also has a large vacuole. cell p also has a cell membrane.
Answers: 1
Chemistry, 22.06.2019 13:30
How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123
Answers: 1
Chemistry, 22.06.2019 17:00
What is the approximate vapor pressure when the gas condenses at 70 degrees celsius
Answers: 2
Chemistry, 23.06.2019 02:10
Detrimental the length of the object shown 1. 97.8mm 2. 97.80 mm 3. 97mm 4. 98mm
Answers: 2
Introduction: It is important to distinguish chemical changes, in which new substances are formed, f...
Mathematics, 24.08.2019 13:50
Chemistry, 24.08.2019 13:50
Social Studies, 24.08.2019 13:50
Mathematics, 24.08.2019 13:50
Biology, 24.08.2019 13:50
Mathematics, 24.08.2019 13:50
Mathematics, 24.08.2019 13:50
Mathematics, 24.08.2019 13:50